[Compatibility]: This throttle accelerator is compatible with Ninebot ES1 ES2 ES3 ES4.. [High Sensitivity]: Installed on the right side of the electric scooter. It can be started with a gentle twist, easy to operate, fast and convenient.. [Easy to use]: With this throttle unit, you can easily control the speed of the electric scooter by manually controlling the throttle.. [Comfortable Grip]: High-quality plastic main body, has a comfortable grip, will not hurt your hands and not easy to damage.. [Note]: Please kindly confirm the fitment before ordering.